BECE Mathematics 2010 Paper

Concept:Bearings are measured clockwise from the North direction.Explanation:The line through $A$ and $B$ makes an angle of $40^{\circ}$ with the straight line $PR$.This is because the angle is found using alternate angles with parallel lines.A straight line gives $180^{\circ}$.The bearing of $B$ from $A$ is the total angle measured clockwise from North to the line $AB$.So, bearing $= 180^{\circ} + 40^{\circ}$.Thus, bearing $= 220^{\circ}$.Answer:$220^{\circ}$, which is option B.